Future job(s) suggestions? help?

I do not know what I want to do in later in life but I know something for sure. I want to do something that is challenging and exciting, I can't imagine myself being in a cubicle sitting in front of a computer doing another man's work I want to do something challenging, surprising, never the same, dangerous and over seas(optional). I've considered the military and private security firms like Xe or dyncorp. But I want some other options that are the way I described my interests. Please help me thank you.